Sound-producing device



Oct. 13, 1927. 1,645,823

o. A. SHANN ET AL SOUND PRODUCING DEVICE Filed Aug. 20, 92

Patented Oct. 18, 1927.

UNITED srArps 1 A.'1".E.1-rr oFFicE.

'OSCAR A. SHANN, OF BROOKLYN, AND FRANK :A. KUNTZ, OF WOODHAVEN, NEW

YORK, ASSIGNORS TO BELL TELEEHOIQ'E LABORATORIES INCORPORATED, OF NEW 7 YORK, N. Y., A CORPORATION on NEW YORK.

SOUND-PRODUCING DEVICE.

Application filed August 20, 1925. Serial No. 51,290.

This invention relates tosound producingdevices, and more particularly toapparatus adapted for use as a ringer gong or the like in telephone systems.

An object of the invention is the provision of an efficient and compact ringer so designed that the space heretofore required therefor is greatly reduced without reducing the volume of sound produced.

A further object of the invention 1s to provide an arrangement of'gongs in space relation to each other that the volume of sound produced by a medium associated therewith may be varied to suit particular conditions.

A feature of the invention is the provision of a single gong in association with an actuating hammer whereby the hammer 18 con trolled to operate Within a confined space and strike a. plurality of projections of the gong so that the number of times the hammer makes contact therewith is equal to the number of times the hammer wouldmake contact with two gongs if placed therebetween. i a

A further feature is the provision of a single gong adjustably associated with a clapper whereby the space in. whlch the clapper operates is varied at Wlll.

Another feature is the provision of a plurality of gongs mounted concentrically one within the other having notches in the peripheries thereof so that a clapper may alternately strike the one gong and then the other by moving in the notches of both.

Another feature is the provision of a plurality of gongs concentrically mounted ona common standard, each of said gongs having a notch in the rim thereof, one side of each of said notches having a projection so that the clapper may first hit one and then the other of .said projections. Further means are provided for obviating possible mufliing by the outer gong of the sound produced by the inner one by having the outer gong perforated.

Other features not specifically mentioned will become apparent from the following description read in conjunction with the following drawing, inwhich, Fig. 1 is a view partly in section of the ringer means having a single gong with projections extending from the rim thereof and a clapper adapted to move between the projections.

Fig. 2 is a top view of Fig. 1. 8 shows a single gong'adapted to be associated with the usual ringer having a pair of projections integral with the periphery of the gong and extending inwardly. Fig A is similar to Flg. 3 with the exception that the projections integral with the rim of the gong extendoutwardly from the rim. Fig. 5 shows a pair of gongs placed one within the other, each having a notch in the rim thereof. One side of each of said notches has a projection integral with the rim in which it is situated, the projection of the inner gong extending outwardly, whereas that of the outer gong extends inwardly so that said projections are substantially in opposition to and parallel with each other. Fig. 6 showsa pair of gongs with a notch in the rim of each and a Y clapper to move within the notches of both. Means are also shown comprising perforations in-the outer gong for purposes more fully explained hereinafter.

Considering Fig.1, 10 represents a supporting base on which is mounted standards 11 which in turn support pole piece 12. 13 represents the usual coils found in a bell or the like between which is positioned actuating device or hammer 14L pivoted at 15 on armature 16. 17 is the ordinary make and break cleviceassociated with'the armature.

Referring more in detail to the structure of applicants signaling deviceor gongs as shown in Fig. 2, 18 represents a single hell or gong adjustably mounted by means of a screw or the like to support standardlt);

In order to securely position the bell on the standard, a splitwasher 20 may be used between the head of the screw and the body of the bell- Arms'21 of the supporting standard have slots 22 .therein so that the standard may be adjustably positioned with respect to the pole piece by means of nuts or screws 23. ,This is for the purpose of moving the bell nearer to or farther away from, the head 240f the clapper. Projections 25 associated with the rim ofthebell are so positioned that the clapper when actuated is caused to strike first one projection and then the other. It should be noted that the projections are Wider at the base than at the tip so that if the bell is moved nearer the head of the clapper by sliding arms 21 under screws '23 toward the coils of the bell, the distance in which clapper 2% would be freeto vibrate is shorter than the distance between the tips of the projection. In other words, by moving the standard as aforesaid,., the gap-in, which the clapper is adapted to move may beadjusted to suit changes in potential or to increase thefvibrating efliciency of the ringer. V

\Vhilethe usual electromagnetic structurehas been shown in Figs. 1 and2 to more clearly illustrate the application of applicants invention, it should be understood that similar structures are usedwith the devices illustrated in the other figures.

F ig13 shows a single gong that may beadjustably positioned on a standard which has a pair or; projections 80 integral with therim 3'1 of'the gongand so positioned with respect to clapper 32 that when the clapper is actuatedupon the energization of associated electromagnetic device it vibrates in notch 33 in the rim ofthe gong and alternatelystrikes projections 30.

Fig.4sl1ows a very similar application with the exception that in this case projections 30 extend outwardly from the rim of the gong. It" may he explained that projections 2300f Figs. 3 and 4, aswell. as projections 25 of Figs. 1; and 2', may be welded or riveted to the rim, or'may be integral therewith to suitvarying conditions. v

Fig. 5 shows a pair of [gongs placed. one within the other and mounted concentrically on -common standard 40. Notches 41 and 42 are respectively located in the rims-c t the outer and inner gongs,the gongs being so positioned that clapper 43 vibrates in the notches of both. Projection 44 is intogral with the rim of theinner gongon one side of the notch therein and projection 45 is integral with the. outer gongand positioned on the side of the notch opposite projection--44. Upon the actuation of the clapper, the projections are alternately struck andIdoubleactionis had. i

Fig; 6 showsa plurality of gongs similar ly placed on a common standard having notches 51 and 52"in'the rimsthereof, clapper 53flbeing adapted to vibrate in the notchesof both. Inthis instancethe clapper iipon being actuated strikes therim otfirst one gong and then the other; Itis noted that the clapper in this case strikes the periphery of the bells directly; and no'projections are provided inassociation with the sides of the notches. Per liorationsb lare provided "inthe outer-gong'so that the sound producedl-by the inner gongmay not be 'muihed by' the ou'fterpne.

" It may be understood that: similar perforations may be placedin the outer gong of the combination shownin Fig. .5.

ItisJto'be observedthat applicant enables r each other with the clapper situated therebetween as is normally the case. With this sing1e1gong,.double action is had due to the use or notches 1n the rim or projections associated with the run in such manner that a single clapper or similar device may come in contact with and producesound at each end of its stroke. In other words, thedouble action of the clapper is obtainedwithout using a plurality of bells placed alongside each other in oneplane. aforesaid,."not only is space conserved; but a more compact and convenient arrangement is l obtained" especially f of advantage when used with handsigna-ling or testingsetsin the electricalfield. I

' lVhat' is claimedis-z 1. A sound producing deficecomprisi ng resoundingmeans" comprising circular cup sha'ped gongsarrd' a clapper to strike said means, said -clapper being" arranged to move in afplane practically coincident with the plane ofthe ed'ge ofsaic'l means-and in a line practically coincident 'witfh the edge of said means, said clapp'er being-pivoted at By this means as such a "point thatthe stem thereof passes beneath the center of said resounding mean's.

2. A sound producing device comprising resounding means and a clapper to strike sald means, said clapper being arrangedto move in a recess cut out' of theedge'of said means in a; planeprahtically coincident with the plane of the edge fof saidmeans and in a line practically coincident-with the edge of said means. i r

3. 'A sound producing kdevice comprising. a

plurality. of gongs-concentrieally mounted one within the other; a notch in the ledge of eachof said gongs,-and a clapper adapted to vibrate-in. saidmotchesl 4. A" sound prod-ucing device comprising a p-hu'alityi oi". gpngs placedone within the other, a notch in the-edge of each o l said gongs, and a clapper positioned" in said notches,'-.whereby upon the actuation of said clapper the sides-of said notches in said gouge are alternately struck, and means'ior prevent-ing the sound produced by 0116 055 said gongs-from being interfered with by the other ofr said gongs; 1

In witness whereof," we 'ih'ereunto subscribe our 1 names this '17th day of August A-i LD. 

